# Circuit breaker Legrand Tx3 403387 B16A 2P 6 kA, thermal-magnetic, 16 A, 2-pole, 6 kA breaking capacity

**URL:** https://aio.lv/en/product--legrand-403387--4760476
**Data updated:** 2026-02-12 14:12 (EET)
**Category:** Power Sockets
**Manufacturer:** Legrand
**Manufacturer code:** 403387
**EAN:** 3414970387172
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 24.99 €
**Prices and availability valid until:** 2026-07-30 23:59
**Price without VAT (21%):** 20.65 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--legrand-403387--4760476

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 17.07.2026 | free |
| Pickup points | 22.07.2026 | 1.89 EUR |
| Courier delivery to door | 22.07.2026 | 4.99 EUR |

## Summary description

Legrand Tx3 403387 is a thermal-magnetic circuit breaker with a B16A tripping characteristic, rated for 16 A and featuring two poles (2P). Designed for protection of circuits against overloads and short circuits, it offers a 6 kA breaking capacity. Suitable for residential and light-commercial electrical panels, it provides reliable circuit isolation and protection during faults.

## Long description

Legrand Tx3 403387 is a thermal-magnetic circuit breaker with a B16A tripping characteristic, rated for 16 A and featuring two poles. Designed to protect electrical circuits from overload and short-circuit conditions, this 2-pole device provides circuit isolation and fault interruption with a rated breaking capacity of 6 kA. It is intended for installation in residential and light-commercial distribution panels where compact, reliable protection is required.
Advantages
The thermal-magnetic design combines long-time overload protection with fast short-circuit interruption, ensuring coordinated response to different fault types. The B characteristic provides reliable protection for general-purpose circuits and small inductive loads. With a 2-pole configuration, the device disconnects both live conductors simultaneously, improving safety during maintenance and fault conditions. The 6 kA breaking capacity meets common installation requirements for small buildings and distribution boards.
Suitable for
Protection of lighting and socket circuits in homes and apartments
Small office and retail electrical distribution
Branch circuit protection in residential consumer units
Replacement of existing B-characteristic breakers in compatible panels
Key specifications
Tripping characteristic: B
Rated current: 16 A
Number of poles: 2 (2P)
Breaking capacity: 6 kA
Operating principle: thermal-magnetic
How to use
Install the circuit breaker into a compatible DIN-rail distribution board according to the panel manufacturer’s wiring diagram and local electrical regulations. Ensure the mains supply is disconnected before installation. Connect line and neutral or both phase conductors as required for the installation, and torque terminals to the manufacturer’s specified values. After wiring, switch the device on and verify correct operation by testing downstream circuits and protective coordination with other protective devices.
Usage recommendations
Use the breaker for circuits with steady-state currents within the 16 A rating and avoid subjecting it to sustained overloads beyond its thermal capacity. Confirm compatibility with the distribution board and neighboring protective devices to ensure selectivity. Periodic inspection and testing in accordance with local regulations are recommended to maintain reliable protection.
Legrand Tx3 403387 — тепломагнитный автоматический выключатель с характеристикой срабатывания B16A, номиналом 16 А и двумя полюсами. Предназначен для защиты цепей от перегрузок и коротких замыканий, обеспечивает размыкание цепи при аварийных режимах и рассчитан на отключающую способность 6 кА. Этот двухполюсный аппарат подходит для установки в бытовых и малых коммерческих распределительных щитах.
Преимущества
Тепломагнитная конструкция сочетает тепловую защиту от перегрузок и магнитную мгновенную защиту от короткого замыкания, обеспечивая адекватный отклик на разные типы неисправностей. Характеристика B подходит для общих цепей освещения и розеток, включая небольшие индуктивные нагрузки. Два полюса позволяют разрывать оба проводника одновременно, повышая безопасность при обслуживании. Отключающая способность 6 кА соответствует типичным требованиям для жилых помещений и небольших объектов.
Подходит для
Защиты линий освещения и розеток в квартирах и частных домах
Небольших офисов и торговых точек
Ветвевых цепей в бытовых щитах
Замены существующих автоматов с характеристикой B в совместимых щитах
Ключевые характеристики
Характеристика срабатывания: B
Номинальный ток: 16 А
Количество полюсов: 2 (2P)
Отключающая способность: 6 кА
Принцип работы: тепломагнитный
Как использовать
Устанавливайте автомат в совместимый DIN-рейковый распределительный щит в соответствии с монтажной схемой щита и местными нормативами по электромонтажу. Перед монтажом отключите питание. Подключайте фазные и/или нулевые проводники согласно схеме, затягивая клеммы с рекомендуемым моментом затяжки производителя. После подключения включите автомат и проверьте работоспособность цепей и координацию с другими защитными устройствами.
Рекомендации по эксплуатации
Применяйте устройство в цепях с токами, не превышающими номинал 16 А, избегайте длительных перегрузок, выходящих за тепловую способность аппарата. Убедитесь в совместимости с корпусом щита и другими защитами для обеспечения селективности. Рекомендуется периодически проводить визуальный осмотр и испытания в соответствии с местными требованиями.
Legrand Tx3 403387 ir termomagnētiskais automāts ar B16A raksturlielumu, nominālais strāvas stiprums 16 A un diviem poliem. Ierīce aizsargā ķēdes pret pārslogošanos un īssavienojumiem un nodrošina pārtraukšanu ar 6 kA izslēgšanas jaudu. Paredzēta uzstādīšanai sadales skapjos dzīvojamām ēkām un nelieliem komerciāliem objektiem.
Priekšrocības
Termomagnētiskā konstrukcija apvieno termisko aizsardzību pret pārslodzi un magnētisku ātru reakciju uz īssavienojumiem, nodrošinot atbilstošu aizsardzību dažādos kļūmes gadījumos. B raksturlielums ir piemērots vispārējām apgaismojuma un kontaktligzdu ķēdēm, tostarp nelielām induktīvām slodzēm. Divu polu konfigurācija ļauj atvienot abus vadu vadus vienlaikus, uzlabojot drošību apkopes laikā. Izslēgšanas jauda 6 kA atbilst parastajām prasībām maziem sadales paneļiem.
Piemērots
Apgaismojuma un kontaktligzdu aizsardzībai mājās un dzīvokļos
Nelielu biroju un tirdzniecības vietu elektroapgādei
Atzaru ķēžu aizsardzībai sadales skapjos
Esošu B raksturlieluma automātu nomaiņai saderīgos paneļos
Atslēgas specifikācijas
Raksturlielums: B
Nominālais strāvas stiprums: 16 A
Polu skaits: 2 (2P)
Izslēgšanas jauda: 6 kA
Darbības princips: termomagnētisks
Kā lietot
Uzstādiet automātu saderīgā DIN sliedes sadales skapī, ievērojot skapja shēmu un vietējos elektrotehniskos normatīvus. Pirms uzstādīšanas atslēdziet barošanu. Pievienojiet fāzes un/nebo nulles vadus atbilstoši shēmai un pievelciet klemmas ar ražotāja ieteikto griezes momentu. Pēc pieslēgšanas ieslēdziet automātu un pārbaudiet ķēžu darbību un aizsargierīču savstarpējo koordināciju.
Lietošanas ieteikumi
Izmantojiet automātu ķēdēs ar strāvām, kas nepārsniedz 16 A nominālu. Izvairieties no ilgstošas pārslogotības, kas pārsniedz termisko kapacitāti. Pārbaudiet saderību ar sadales skapja konstrukciju un citām aizsargierīcēm, lai nodrošinātu selektivitāti. Regulāras apskates un pārbaudes atbilstoši vietējiem noteikumiem ir ieteicamas.

## FAQ

### How much does the Circuit breaker Legrand Tx3 403387 B16A 2P cost, and is it available for purchase?

The price is 24.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 3 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

### If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 17.07.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer, Bank cards on-line, Apple Pay, Google Pay. All transactions are 100% secure and encrypted.

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All Legrand products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized Legrand service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

## Image

https://aio.lv/img/cache/product/4760476/66633359_large.webp